Hi. I'm installing a Nougat based Archos Core 70 tablet, with a DAB radio usb dongle in my car, but I'm having trouble sorting out the power scheme.
I can't get it to boot on car ignition due to problems editing fastboot in Mediatek phones/tablets like the Archos. So I've removed the battery and replaced it with 4.2v direct from the car battery, intending to have it sleep/wake on ignition through usb power.
However my otg usb hub wont register a usb power input while being able to run the DAB dongle. I don't need the input to charge, only to signal Tasker to sleep/wake the tablet.
Can Tasker take any other signals from usb apart from power? e.g. when some device is plugged in, or even a usb switch that outputs data instead of power. If needed I can add a relay to a usb input that closes on car ignition so it's as if I was physically plugging/unplugging a device.
Thanks.
Related
I don't know much about USB. I was thinking coming up with ONE cable with three connectors like the one I draw blow.
Code:
XDA -------USB (to laptop or ac adaptor)
|
|
GPS (the generic GPS connect).
NOTE: the ac adaptor output port is an USB port
it serves for three ways
a), XDA -> Laptop, charge and syn in the same cable, draws power from laptop
b). GPS -> laptop, draws power from laptop
c). XDA -> GPS, in this case, USB connector connects to the ac adapter and power both GPS and XDA.
I believe the XDA---USB cable can be purchased easily. I can break the cable and somehow insert the GPS connector. since GPS only used a power pin, two data pin, a ground pin, I figure I only need to find out how to get these four pin into the original cable.
My question is
1. do I need any USB-serial sort of convertor between the lines? Or it is ok to connect GPS(serials signal) to USB cable
2. The ac adapter was to power the XDA which I blieve is 6V, and GPS needs 5 V, is it OK?
3. anyone alreadys knows how to plug the four GPS pins to USB cable? would save me a lot of trouble.
It would be cool to have a cable connects between all devices. If you can care for a DC-AC convertor in your car, this set should solve all your problem anywhere.
help is appreciated.
Most GPS units are serial. The XDA does have serial, so you can use that. You only need to connect the ground and two data pins. Specified input power for the XDA is 5v.
You can see what I did with a cradle to make a car kit here:
http://www.mywirelessoffice.com/xda/carkit/
This is a pin spec and photo of the connector:
http://www.mywirelessoffice.com/xda/connector/
There is a source for bare connetors, I believe the link is here on the XDA-Dev site somewhere.
Re: XDA -> Laptop USB, GPS-> laptop USB, are they the
It is possible. But note:
1. I assume you are using a serial GPS (with appropriate wiring), then it is OK. USB GPS CANNOT be used.
2. USB sync cable is wired to tell XDA that USB sync cable is connected so as to "wake up" the USB port. In such case, I do not know wheter the serial port can be accessed. As such has not been done before you have to try before you know.
I would suggest you make a cable just for GPS use, and use another cable for sync/charge (this is quite cheap), unless you found that your original idea works.
pine said:
I don't know much about USB. I was thinking coming up with ONE cable with three connectors like the one I draw blow.
Code:
XDA -------USB (to laptop or ac adaptor)
|
|
GPS (the generic GPS connect).
NOTE: the ac adaptor output port is an USB port
it serves for three ways
a), XDA -> Laptop, charge and syn in the same cable, draws power from laptop
b). GPS -> laptop, draws power from laptop
c). XDA -> GPS, in this case, USB connector connects to the ac adapter and power both GPS and XDA.
I believe the XDA---USB cable can be purchased easily. I can break the cable and somehow insert the GPS connector. since GPS only used a power pin, two data pin, a ground pin, I figure I only need to find out how to get these four pin into the original cable.
My question is
1. do I need any USB-serial sort of convertor between the lines? Or it is ok to connect GPS(serials signal) to USB cable
2. The ac adapter was to power the XDA which I blieve is 6V, and GPS needs 5 V, is it OK?
3. anyone alreadys knows how to plug the four GPS pins to USB cable? would save me a lot of trouble.
It would be cool to have a cable connects between all devices. If you can care for a DC-AC convertor in your car, this set should solve all your problem anywhere.
help is appreciated.
Click to expand...
Click to collapse
Hey, so, I have a micro-usb to usb+3.5mm-audio cable from an old phone's car dock, which I'd like to use with the "Audio-Out Accessory" setting in my HTC One's car-mode app. The problem is, when the cable is plugged in, the Audio-Out Accessory setting still registers as "disconnected."
I've tried triggering "car dock mode" with tasker to no effect. I'm wondering whether it's a matter of a missing extra resistor on the mini-usb to make the phone recognize the audio-out cable as connected, and if there's a software-only way to spoof that resistor's presence. Or maybe there's a necessary intermediary between the phone and the cable that converts the digital usb-out signal to analog?
Any ideas?
Normal cables provide +5v on pin 1, for charging purposes. This also provides power to unused pin 4 for Factory Mode, if so wired.
I was wondering: will the phone connect to a PC without being supplied power at all (e.g. only Data +/- and GND connected), or is the 5v needed for sense purposes and/or to power the onboard USB controller?
Hi all - I'm finishing up installing a 2019 Samsung Tab A 10,1 into my Chrysler 300C. Everything is great, except that my USB SSD drive kills the battery when in standby. Let me detail the build:
Samsung Tab A 10,1 > USB C > Kingston Nucleum USB hub
- This is the only connection into the tablet. The hub is powered from a 12v USB point with USB 3.0 QC and a USB-C PD port. Pass through charging wakes the tablet up as the accessory power energises. Once turned off, the tablet renegotiates power supply arrangements and starts to deliver this to the hub itself. At least, that's my understanding.
Connected to the hub is a 512GB Sandisk SSD (USB 3.0), a Meizu Pro Hifi DAC (USB C) and an external USB 3.0 socket.
Is it possible to have the tablet either unmount the SSD whilst not powered (the SSD might still draw power even even unmounted?) or preferably not take on the role of being the supplier of power to the USB hub? Alternative suggestions are of course welcomed.
Prostheta said:
Hi all - I'm finishing up installing a 2019 Samsung Tab A 10,1 into my Chrysler 300C. Everything is great, except that my USB SSD drive kills the battery when in standby. Let me detail the build:
Samsung Tab A 10,1 > USB C > Kingston Nucleum USB hub
- This is the only connection into the tablet. The hub is powered from a 12v USB point with USB 3.0 QC and a USB-C PD port. Pass through charging wakes the tablet up as the accessory power energises. Once turned off, the tablet renegotiates power supply arrangements and starts to deliver this to the hub itself. At least, that's my understanding.
Connected to the hub is a 512GB Sandisk SSD (USB 3.0), a Meizu Pro Hifi DAC (USB C) and an external USB 3.0 socket.
Is it possible to have the tablet either unmount the SSD whilst not powered (the SSD might still draw power even even unmounted?) or preferably not take on the role of being the supplier of power to the USB hub? Alternative suggestions are of course welcomed.
Click to expand...
Click to collapse
You can use tasker to recognize usb charging on/off and when tab is gonna lose usb charging set it to power off. Unless tab can deliver power from usb even if its off, than you should search for another solution.
For tasker help go to Tasker tips & tricks section on XDA.
Good luck.
Sent from my Galaxy Tab 2 3G using XDA Labs
Thanks for the input! I'll have a look into Tasker. I'm guessing that when you say "power off", the tablet itself is not being shut down....after all, waking an Android device from cold is somewhat annoying to have to do manually every time one starts the engine. Currently Auto Mate wakes the tablet on a USB charging condition and instantly opens the main screen. Very convenient. Hopefully Tasker can integrate into this setup without conflicting with the functionality that works right now! I'll keep this thread updated with what I find, actions taken, etc. so that anybody else going down the path I have doesn't have to ask or chase themselves....
Cheers.
Okay, first impressions. It seems that Tasker might be able to do this but as stated, I suspect that it may conflict with the functionality of Auto Mate. After installing the demo version of Tasker and creating a basic Profile/Task to test detection of USB charging removal (beep, not sure if can/how to unmount yet) Auto Mate no longer autostarts when plugging in USB charging. That bit is somewhat of a backward step before we've even started to move forwards
I'll keep testing and experimenting and hopefully things will fall into place a little better.
Hello, I have an idea how we can make the current Android Auto completely WIRELESS.
Idea is as follows:
Plug a micro Dongle in the car's USB port.
The Dongle will essentially be a WiFi Tranciever. (it may need custom code/firmware etc.)
The Dongle will talk to the Android Phone over WiFi (Because Bluetooth is already being used by Android Auto).
A custom program will be running on the Android phone to send ALL USB Data to the Dongle using WiFi.
Suggested Dongle models:
Xbee, Arduino with WiFi module, any other similar board, possibly any cheap Chinese WiFi USB dongle available on Ebay/Aliexpress.
Things to consider:
The Car's infotainment must recognize the Dongle when it is plugged in as a "USB device" (not a USB Stick/Flash Drive !!!)
The Dongle may need custom code/firmware that will start sending packets to the car's infotainment as soon as it is connected/powered up/car ignition is on, in order to Emulate a phone running android auto.
In the mean time, the app running on the phone will already be connected to the Dongle and the two will be talking to each other.
I you have any other suggestions, leave a comment bellow.
PS: Such devices (USB Over the Air) are actually available on the market, but are quite bulky. We need something smaller.
But even if it is big, we can use a Micro USB plug like this one with flat cable, that will run in the Phone tray, where the board will be hidden so it will not be visible at all!!! :good::laugh:
https://www.aliexpress.com/item/4000325524998.html
Just cut the other end of the flat cable if needed and solder as necessary.
Again, if you have specific ideas/suggestions leave a comment bellow.
https://www.indiegogo.com/projects/aawireless#/